Preheat oven to 180 degree C. Line a loaf pan with parchment paper.
Take apples, brown sugar, cinnamon in a bowl and mix well.
Take egg, sugar, vanilla, oil, milk in a bowl and mix well.
Add in baking soda, baking powder and salt and mix well.
Add flour and fold gently.
Spoon half of the batter into the pan. Spoon apples mix on top.
Spoon remaining batter.
Bake for 45 mins to 1 hour. After 30 mins if the cake is getting too dark, cover with foil loosely.
Remove and cool completely.
Slice and serve.